will aero springs work on a '92 9kS Non turbo?

[saab9000noobie]

I just bought Bilsteins with aero springs from e-bay for the front and am curious if they will
work well on my car. I have Bilsteins in the rear and they are awesome.

Will I/ should I get rear aero springs?

[saab9000noobie]

the set was removed from a '96 aero.

what's the difference between the '92 Non-turbo springs and aero?
i would assume they are shorter and stiffer.
I'm swapping the front springs in (came on bilsteins)
what is the length difference for the rear spring '92 verse aero?